diff --git a/Userland/Services/WebContent/main.cpp b/Userland/Services/WebContent/main.cpp
index 081f24bbb4..d6c5b77ffe 100644
--- a/Userland/Services/WebContent/main.cpp
+++ b/Userland/Services/WebContent/main.cpp
@@ -25,7 +25,7 @@
 ErrorOr<int> serenity_main(Main::Arguments)
 {
     Core::EventLoop event_loop;
-    TRY(Core::System::pledge("stdio recvfd sendfd accept unix rpath"));
+    TRY(Core::System::pledge("stdio recvfd sendfd accept unix rpath thread"));
 
     // This must be first; we can't check if /tmp/webdriver exists once we've unveiled other paths.
     auto webdriver_socket_path = DeprecatedString::formatted("{}/webdriver", TRY(Core::StandardPaths::runtime_directory()));